WO2011128028A2 - Bobine d'enroulement de cordon de forme conique et ayant des marches circonférentielles - Google Patents

Bobine d'enroulement de cordon de forme conique et ayant des marches circonférentielles Download PDF

Info

Publication number
WO2011128028A2
WO2011128028A2 PCT/EP2011/001656 EP2011001656W WO2011128028A2 WO 2011128028 A2 WO2011128028 A2 WO 2011128028A2 EP 2011001656 W EP2011001656 W EP 2011001656W WO 2011128028 A2 WO2011128028 A2 WO 2011128028A2
Authority
WO
WIPO (PCT)
Prior art keywords
spool
cord
spool portion
winding
tread
Prior art date
Application number
PCT/EP2011/001656
Other languages
English (en)
Other versions
WO2011128028A3 (fr
Inventor
Nicolaas Dekker
Christianus Wilfred Michael Slobbe
Original Assignee
Hunter Douglas Industries B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunter Douglas Industries B.V. filed Critical Hunter Douglas Industries B.V.
Priority to CA2796498A priority Critical patent/CA2796498C/fr
Priority to US13/641,475 priority patent/US9157273B2/en
Priority to DK11712490.9T priority patent/DK2558670T3/en
Priority to EP11712490.9A priority patent/EP2558670B1/fr
Priority to AU2011240377A priority patent/AU2011240377B2/en
Priority to CN201180024562.4A priority patent/CN102892969B/zh
Publication of WO2011128028A2 publication Critical patent/WO2011128028A2/fr
Publication of WO2011128028A3 publication Critical patent/WO2011128028A3/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives

Definitions

  • the present invention relates to a mechanism for extending or retracting a covering for an architectural opening, such as Venetian blinds, roman shades, pleated window coverings or the like. It includes a drive shaft and a driven cord spool mounted in keyed connection with the drive shaft, about which a lift cord can be wound in order to retract or extend the window covering.
  • conical spools that usually have a first end having a first diameter and a second end having a second diameter, the second diameter being smaller than the first.
  • Such spools generally include a sloping portion where, the diameter of the spool reduces from the first diameter over a predetermined axial length to the second smaller diameter.
  • a relatively steep and short sloping portion is followed by a body portion that ends in the second smaller diameter end. The cord is affixed to the smaller diameter end and is guided onto the spool at the larger diameter end.
  • Such spools are described in CH 581 ,257; EP 0,554,212; DE 195,05,824; EP 1 ,431 ,508; EP 1 ,577,483; US 5,908,062; and WO 2004/048739.
  • spools are used in mechanisms where the spool is mounted to rotate with a driven shaft while remaining stationary in axial direction, i.e. the spool is rotatable but does not move in longitudinal direction.
  • the shape of the spool is especially designed to prevent cord windings of the lift cord being wound about the spool from overlapping, while ensuring the axial transport of these windings.
  • a problem with these known spools when used in the raising and lowering mechanisms is that it has been difficult, in operation, to get identical windings of lift cords on each and every spool.
  • a slanted position of the bottom bar is objectionable from a consumer's point of view.
  • the problem is particularly visible in window coverings with only two cord spools and can only be corrected by completely lowering the bottom bar and thus unwinding the lift cords from their spools.
  • the present invention provides a mechanism for extending or retracting for a covering for an architectural opening with respect to an
  • the mechanism including a rotatable drive shaft, at least one lift cord, at least one cord spool for winding and unwinding the at least one lift cord, the cord spool being mounted for rotation with the drive shaft while being axially stationary and the cord spool having a first diameter end and a second diameter end and the first diameter being larger than the second diameter and the spool having a first generally conical circumferential spool portion between the first and second end and the first spool portion having a plurality of steps, each step having a tread.
  • the tread of each step is axially long enough to accommodate a single cord winding but not long enough to accommodate two cord windings, such that in use a newly formed winding will be formed on the first step adjacent the first diameter end and in the process of being formed will push a previous formed cord winding toward the smaller diameter end and off the first step.
  • the tread of each step is horizontal in axial direction. Also each tread advantageously has the same axial length.
  • Lsio e stands for the axial length of the spool along which the first spool portion extends
  • a stands for the slope angle of the first spool portion relative to horizontal
  • Utep stands for the axial length of each step.
  • a second spool portion extends between the first spool portion and the second diameter end.
  • the second spool portion is conical at a smaller taper than the first spool portion. Also advantageously the second spool portion can be generally cylindrical.
  • the second spool portion has a plurality of strips extending axially between the end of the first spool section and the second spool end.
  • the circumferential surface of the second spool portion is shaped to have at least one elongated strip-like body portion having a shape consistent with a radius that is larger than the actual spool radius such that the circumferential surface of the strips lies somewhat inwardly from the rest of the circumferential surface of the spool.
  • the radius of the at least on strip reduces along the axial length of the second spool section such that the radius of the at least one strip is larger adjacent first spool section and smaller adjacent the second spool end.
  • Figure 1 is a partial cross sectioned drawing of a window covering with the raising and lowering device of to the invention
  • Figure 2 is a partial perspective view of the cord spool of the raising and lowering device of the invention in a support member
  • Figure 3 is a perspective view of the cord spool of the raising and lowering device of the invention
  • Figure 4 is a partial cross sectional view of the cord spool of the raising and lowering device of the invention
  • Figure 1 shows a roman shade 1 with a head rail 3 in which on a driven shaft 5 left and a right cord spools 7, 9 are mounted about which a lift cord 1 1 , 13 can be wound and unwound in order to lift or lower the shade.
  • a ball chain operator 15 is shown at one end of the head rail. Either the front or rear length 17A, 17B of the looped ball chain 17 can be pulled whereupon the shaft 5 will be driven to rotate in clockwise or counterclockwise direction.
  • the shaft 5 is rotatable and axially stationary in the head rail.
  • each lift cord 1 1 , 13 is attached to the bottom bar 19 of the blind, the cord other end 11 B, 13B is guided through an opening (not shown) into the head rail and onto the cord spool 7, 9 and is fixed to the respective cord spool 7, 9.
  • the spools are rotated too and the lift cords will be wound on or unwound from the spools, thus lifting or lowering the blind.
  • the cord spools 7, 9 each have a first or larger diameter end 21 , 27 , and a second or smaller diameter end 23, 29 as well as a first spool portion 33 (not visible in figure 1) and a second spool portion 25, 31 extending axially one behind the other between these diameter ends.
  • the second cord ends are attached to the cord spools at or adjacent the second diameter ends 23, 29 of the cord spools by any suitable means. I.e. by a knot anchored in a slot in the spool or e.g. by clamping the cord end between the spool and a clamp that partially or wholly surrounds the spool.
  • the cord spools 7, 9 are fixed on the driven shaft 5 and upon rotation of the shaft the spools also rotate.
  • the spools are also fixed with respect to the headrail in respective left and right axial positions by left and right spool support members 47, 47B which are anchored to the head rail such that the support members are aligned with the respective openings in the head rail through which the lift cords 11 , 13 are guided onto the spools inside the head rail.
  • a spool support member 47 (as best visible in Figure 2) includes a support base 49, a cord opening 51 in its base for the lift cord to pass through and a cord camming surface 53 (not shown) ensuring alignment and transport of all cord windings.
  • the left and right cord spools are identical in shape and further details of the cord spools are illustrated by showing and describing the left cord spool 7 only.
  • FIGS 2, 3 and 4 best illustrate the shape of the left cord spool 7. Since all cord spools for a blind are identical only the left cord spool is described in detail.
  • the cord spool 7 has a first or larger diameter end 21 and a second or smaller diameter end 23. Extending from the larger diameter end 21 towards the smaller diameter end is a first sloped or conical portion 33.
  • the sloped portion 33 is chosen to have a relatively steep slope and extends over a relatively short longitudinal portion of the spool 7.
  • the end 33A of the sloped portion 33 has a diameter that is equal or slightly larger than the smaller diameter end 23. Starting from the end 33A of the sloped portion 33 a second or elongated body portion 25 extends to the second diameter end.
  • the second spool body portion is level or very slightly sloped.
  • the second spool portion 25 has two elongated strip-like body portions 25B shaped into having a shape consistent with a radius that is larger than the actual spool radius, thus the circumferential surface of the strips 25B lies somewhat inwardly from the rest of the circumferential surface of the spool and in particular with respect to the adjacent elongated spool sections 25A as shown in figure 3.
  • the radius of the strips 25B is sloped along the axial length of the spool.
  • the strip-radius adjacent the first spool section near the last step 45 is larger than the strip radius at the second spool end 23.
  • the presence of the strips 25B is especially advantageous when the second spool portion is effectively of constant diameter and thus level.
  • the length of the second spool portion 25 is longer than the length of the first spool portion 33.
  • the first spool section 33 is conical with a stronger taper and the second spool portion 25 is level and has effectively a constant diameter. Thus the first spool section 33 has a steeper slope angle then the second spool portion 25.
  • the first spool portion 33 is subdivided in a plurality of steps 35, 37, 39, 41 , 43, 45 each having a tread 35A, 37A, 39A, 41 A, 43A, 45A and riser 35B, 37B, 39B, 41 B, 43B, 45B.
  • the steps are in the circumferential surface of the first spool section and each tread is horizontal and extends in axial direction and each riser is generally vertical and extends in radial direction towards the central axis of rotation of the spool.
  • the horizontal treads of the steps will prevent an axial force component stemming from the weight of the blind from acting on the cord windings. Thus the total axial force acting on the cord windings has been limited.
  • each tread of each step is wide enough to accommodate one cord winding but too narrow to accommodate two cord windings.
  • the length of the spool along which the sloped portion 33 extends is Lslope.
  • the angle of decline of the sloped portion is a.
  • Steps Nsteps- Formula 1 will determine the number of steps is as follows
  • the rate of progression of the windings in axial direction along the spool can thus be influenced by altering the slope angle a of the sloped portion 33. As shown above changing the angle while keeping the other variables the same will result in a higher riser.
  • a cord winding on the second step will experience reduced friction compared to a winding on the first step, and likewise on each subsequent step further down the friction is less because the diameter of the spool at each step is reduced compared to that of the previous step.
  • the last step (45) may be chosen to be of different size to function as a transfer portion between the sloped portion 33 and the second spool portion 25.
  • the operator 25 In use upon pulling one of the front or rear lengths 17A, 17B of the ball chain 17, the operator 25 will drive shaft 5 to rotate.
  • the spools will also rotate and when the direction of rotation is for lifting the blind the lift cords 1 1 , 13 will be wound about the spools 7, 9.
  • the windings After a few initial turns of the spool during which the lift cord is first wound about the spool the windings will start to form in a first position on the first tread 35A of the spool 7.
  • Each subsequent winding will be formed in the same first position, i.e. on the first tread 35A of the first step 35 and in the process will push the previously formed winding axially away, off the first tread and into a second position on the tread 37A of the second step 37.
  • the operation and construction of the present invention will be apparent from the foregoing description.
  • the invention is further limited by the terms of the claims and not limited to the embodiment herein described, as such it will be clear that the device is not limited to use in a Roman shade.
  • the support member for the cord spool When used in a Venetian blind the support member for the cord spool will be differently shaped and the camming member will be differently placed.
  • the slope angle, then number of steps, the length of the sloped section of the spool can all be altered to suit the blind in which the device is used.
  • the whole spool body can be conical and formed in steps each having a tread and a riser.
  • ball chain operator 15 can be provided, e.g. a motor, a spring motor, a crank shaft, a single pull cord drive system etc.
  • the second spool portion may be conical like the first spool portion but with a smaller taper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Ropes Or Cables (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

L'invention concerne un mécanisme permettant de faire sortir ou de faire rentrer un revêtement pour ouverture architecturale par rapport à une ouverture architecturale, comprenant un arbre d'entraînement rotatif (5); au moins un cordon de levage (11,13), au moins une bobine d'enroulement de cordon (7, 9) permettant d'enrouler et de dérouler ledit au moins un cordon de levage, la bobine d'enroulement de cordon étant montée à des fins de rotation par rapport à l'arbre d'entraînement et étant fixe dans le sens axial. La bobine d'enroulement de cordon a une extrémité d'un premier diamètre (21, 27) et une extrémité d'un second diamètre (23, 29), le premier diamètre étant supérieur au second diamètre, et la bobine ayant une première partie de bobine circonférentielle généralement conique (33) entre celles-ci, la première partie de bobine (33) comportant une pluralité de marches (35, 37, 39, 41, 43, 45), chaque marche ayant un dessus de marche (35A, 37A, 39A, 41A, 43A, 45A).
PCT/EP2011/001656 2010-04-16 2011-04-01 Bobine d'enroulement de cordon de forme conique et ayant des marches circonférentielles WO2011128028A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2796498A CA2796498C (fr) 2010-04-16 2011-04-01 Bobine d'enroulement de cordon de forme conique et ayant des marches circonferentielles
US13/641,475 US9157273B2 (en) 2010-04-16 2011-04-01 Conical cord-winding spool with circumferential steps
DK11712490.9T DK2558670T3 (en) 2010-04-16 2011-04-01 CONIC CORD WINDING COIL WITH PERIPHERICAL STEPS
EP11712490.9A EP2558670B1 (fr) 2010-04-16 2011-04-01 Bobine d'enroulement de cordon de forme conique et ayant des marches circonférentielles
AU2011240377A AU2011240377B2 (en) 2010-04-16 2011-04-01 Conical cord-winding spool with circumferential steps
CN201180024562.4A CN102892969B (zh) 2010-04-16 2011-04-01 具有圆周梯级的锥形绳索缠绕线轴

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10004038.5 2010-04-16
EP10004038 2010-04-16

Publications (2)

Publication Number Publication Date
WO2011128028A2 true WO2011128028A2 (fr) 2011-10-20
WO2011128028A3 WO2011128028A3 (fr) 2011-12-29

Family

ID=44584102

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/001656 WO2011128028A2 (fr) 2010-04-16 2011-04-01 Bobine d'enroulement de cordon de forme conique et ayant des marches circonférentielles

Country Status (7)

Country Link
US (1) US9157273B2 (fr)
EP (1) EP2558670B1 (fr)
CN (1) CN102892969B (fr)
AU (1) AU2011240377B2 (fr)
CA (1) CA2796498C (fr)
DK (1) DK2558670T3 (fr)
WO (1) WO2011128028A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014173383A1 (fr) * 2013-04-24 2014-10-30 FKN Holding GmbH & Co. KG Dispositif et procédé d'actionnement d'un store dans un système de vitrage étanche aux gaz
US20150020980A1 (en) * 2012-02-28 2015-01-22 Hunter Douglas Industries B.V. Retractable covering
US11891855B2 (en) 2020-01-28 2024-02-06 Levolor, Inc. Leveling assembly for adjusting the levelness of a bottom rail of a covering for an architectural structure

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Publication number Priority date Publication date Assignee Title
CN102892969B (zh) * 2010-04-16 2016-04-20 亨特道格拉斯工业公司 具有圆周梯级的锥形绳索缠绕线轴
US9352930B2 (en) * 2013-12-29 2016-05-31 Google Inc. Methods and systems for winding a tether
CN106050108B (zh) * 2016-07-25 2018-05-08 苏州鸿仁窗饰有限公司 用于窗帘拉绳收放的收放装置及收放式窗帘
CN106089002A (zh) * 2016-07-25 2016-11-09 苏州鸿仁窗饰有限公司 绕线组件及收放式窗帘
US10676988B2 (en) * 2017-09-20 2020-06-09 Whole Space Industries Ltd. Window covering control apparatus
AU2018253645A1 (en) * 2017-10-31 2019-05-16 Hunter Douglas Industries B.V. Control mechanism for a double pitch blind and a double pitch blind assembly
USD893966S1 (en) * 2019-04-24 2020-08-25 Sbcd Enterprises Llc Windshield deicer
US11434690B2 (en) * 2019-05-08 2022-09-06 Lutron Technology Company Llc Lift cord spool for a motorized treatment
TWI753813B (zh) * 2021-04-12 2022-01-21 慶豐富實業股份有限公司 具導滑件之捲線組件及使用該捲線組件的窗簾
TWI771181B (zh) * 2021-09-10 2022-07-11 慶豐富實業股份有限公司 具翻轉件之捲線組件及使用該捲線組件的窗簾

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EP0554212A1 (fr) 1992-01-30 1993-08-04 Somfy Dispositif d'enroulement de cordon de suspension de store
DE19505824A1 (de) 1995-02-21 1996-08-22 Mhz Hachtel & Co Sonnenschutz- und/oder Dekorationseinrichtung für Fenster
US5908062A (en) 1997-09-02 1999-06-01 Fun; Fu-Mei Lifting track of curtain
US20010035269A1 (en) 2000-04-14 2001-11-01 Ren Judkins Lift system having length adjustment for window blinds
WO2004048739A1 (fr) 2002-11-26 2004-06-10 Somfy Sas Dispositif de manoeuvre d'un store suspendu
EP1431508A2 (fr) 2002-12-19 2004-06-23 Hunter Douglas Industries B.V. Méchanisme de relevage et d'abaissement de stores
EP1577483A1 (fr) 2004-03-18 2005-09-21 MOTTURA S.p.A. Dispositif d'enroulement de cordon de suspension de store

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CN102892969B (zh) * 2010-04-16 2016-04-20 亨特道格拉斯工业公司 具有圆周梯级的锥形绳索缠绕线轴
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Publication number Priority date Publication date Assignee Title
CH581257A5 (fr) 1974-07-22 1976-10-29 Agero Ag
EP0554212A1 (fr) 1992-01-30 1993-08-04 Somfy Dispositif d'enroulement de cordon de suspension de store
DE19505824A1 (de) 1995-02-21 1996-08-22 Mhz Hachtel & Co Sonnenschutz- und/oder Dekorationseinrichtung für Fenster
US5908062A (en) 1997-09-02 1999-06-01 Fun; Fu-Mei Lifting track of curtain
US20010035269A1 (en) 2000-04-14 2001-11-01 Ren Judkins Lift system having length adjustment for window blinds
WO2004048739A1 (fr) 2002-11-26 2004-06-10 Somfy Sas Dispositif de manoeuvre d'un store suspendu
EP1431508A2 (fr) 2002-12-19 2004-06-23 Hunter Douglas Industries B.V. Méchanisme de relevage et d'abaissement de stores
EP1577483A1 (fr) 2004-03-18 2005-09-21 MOTTURA S.p.A. Dispositif d'enroulement de cordon de suspension de store

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150020980A1 (en) * 2012-02-28 2015-01-22 Hunter Douglas Industries B.V. Retractable covering
US9863185B2 (en) * 2012-02-28 2018-01-09 Hunter Douglas Industries Bv Retractable covering
WO2014173383A1 (fr) * 2013-04-24 2014-10-30 FKN Holding GmbH & Co. KG Dispositif et procédé d'actionnement d'un store dans un système de vitrage étanche aux gaz
US11891855B2 (en) 2020-01-28 2024-02-06 Levolor, Inc. Leveling assembly for adjusting the levelness of a bottom rail of a covering for an architectural structure

Also Published As

Publication number Publication date
WO2011128028A3 (fr) 2011-12-29
CN102892969A (zh) 2013-01-23
AU2011240377A1 (en) 2012-11-08
DK2558670T3 (en) 2018-03-05
EP2558670B1 (fr) 2018-01-10
CN102892969B (zh) 2016-04-20
CA2796498C (fr) 2018-08-14
AU2011240377B2 (en) 2016-03-31
CA2796498A1 (fr) 2011-10-20
EP2558670A2 (fr) 2013-02-20
US9157273B2 (en) 2015-10-13
US20130048235A1 (en) 2013-02-28

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